diff-files.c

   1 /*
   2  * GIT - The information manager from hell
   3  *
   4  * Copyright (C) Linus Torvalds, 2005
   5  */
   6 #include "cache.h"
   7 #include "diff.h"
   8
   9 static const char *diff_files_usage =
  10 "git-diff-files [-p] [-q] [-r] [-z] [-M] [-C] [-R] [-S<string>] [paths...]";
  11
  12 static int diff_output_format = DIFF_FORMAT_HUMAN;
  13 static int detect_rename = 0;
  14 static int diff_setup_opt = 0;
  15 static int diff_score_opt = 0;
  16 static const char *pickaxe = NULL;
  17 static int pickaxe_opts = 0;
  18 static int diff_break_opt = -1;
  19 static const char *orderfile = NULL;
  20 static int silent = 0;
  21
  22 static void show_unmerge(const char *path)
  23 {
  24         diff_unmerge(path);
  25 }
  26
  27 static void show_file(int pfx, struct cache_entry *ce)
  28 {
  29         diff_addremove(pfx, ntohl(ce->ce_mode), ce->sha1, ce->name, NULL);
  30 }
  31
  32 static void show_modified(int oldmode, int mode,
  33                           const unsigned char *old_sha1, const unsigned char *sha1,
  34                           char *path)
  35 {
  36         diff_change(oldmode, mode, old_sha1, sha1, path, NULL);
  37 }
  38
  39 int main(int argc, const char **argv)
  40 {
  41         static const unsigned char null_sha1[20] = { 0, };
  42         int entries = read_cache();
  43         int i;
  44
  45         while (1 < argc && argv[1][0] == '-') {
  46                 if (!strcmp(argv[1], "-p"))
  47                         diff_output_format = DIFF_FORMAT_PATCH;
  48                 else if (!strcmp(argv[1], "-q"))
  49                         silent = 1;
  50                 else if (!strcmp(argv[1], "-r"))
  51                         ; /* no-op */
  52                 else if (!strcmp(argv[1], "-s"))
  53                         ; /* no-op */
  54                 else if (!strcmp(argv[1], "-z"))
  55                         diff_output_format = DIFF_FORMAT_MACHINE;
  56                 else if (!strcmp(argv[1], "-R"))
  57                         diff_setup_opt |= DIFF_SETUP_REVERSE;
  58                 else if (!strncmp(argv[1], "-S", 2))
  59                         pickaxe = argv[1] + 2;
  60                 else if (!strncmp(argv[1], "-O", 2))
  61                         orderfile = argv[1] + 2;
  62                 else if (!strcmp(argv[1], "--pickaxe-all"))
  63                         pickaxe_opts = DIFF_PICKAXE_ALL;
  64                 else if (!strncmp(argv[1], "-B", 2))
  65                         diff_break_opt = diff_scoreopt_parse(argv[1]);
  66                 else if (!strncmp(argv[1], "-M", 2)) {
  67                         diff_score_opt = diff_scoreopt_parse(argv[1]);
  68                         detect_rename = DIFF_DETECT_RENAME;
  69                 }
  70                 else if (!strncmp(argv[1], "-C", 2)) {
  71                         diff_score_opt = diff_scoreopt_parse(argv[1]);
  72                         detect_rename = DIFF_DETECT_COPY;
  73                 }
  74                 else
  75                         usage(diff_files_usage);
  76                 argv++; argc--;
  77         }
  78
  79         /* At this point, if argc == 1, then we are doing everything.
  80          * Otherwise argv[1] .. argv[argc-1] have the explicit paths.
  81          */
  82         if (entries < 0) {
  83                 perror("read_cache");
  84                 exit(1);
  85         }
  86
  87         diff_setup(diff_setup_opt);
  88
  89         for (i = 0; i < entries; i++) {
  90                 struct stat st;
  91                 unsigned int oldmode, mode;
  92                 struct cache_entry *ce = active_cache[i];
  93                 int changed;
  94
  95                 if (ce_stage(ce)) {
  96                         show_unmerge(ce->name);
  97                         while (i < entries &&
  98                                !strcmp(ce->name, active_cache[i]->name))
  99                                 i++;
 100                         i--; /* compensate for loop control increments */
 101                         continue;
 102                 }
 103
 104                 if (lstat(ce->name, &st) < 0) {
 105                         if (errno != ENOENT && errno != ENOTDIR) {
 106                                 perror(ce->name);
 107                                 continue;
 108                         }
 109                         if (silent)
 110                                 continue;
 111                         show_file('-', ce);
 112                         continue;
 113                 }
 114                 changed = ce_match_stat(ce, &st);
 115                 if (!changed && detect_rename < DIFF_DETECT_COPY)
 116                         continue;
 117
 118                 oldmode = ntohl(ce->ce_mode);
 119                 mode = (S_ISLNK(st.st_mode) ? S_IFLNK :
 120                         S_IFREG | ce_permissions(st.st_mode));
 121
 122                 show_modified(oldmode, mode, ce->sha1, null_sha1,
 123                               ce->name);
 124         }
 125         diffcore_std((1 < argc) ? argv + 1 : NULL,
 126                      detect_rename, diff_score_opt,
 127                      pickaxe, pickaxe_opts,
 128                      diff_break_opt,
 129                      orderfile);
 130         diff_flush(diff_output_format, 1);
 131         return 0;
 132 }